Core i7-840QM vs Pentium Dual Core T3400
Core i7-840QM
Pentium Dual Core T3400
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. The Core i7-840QM is positioned at rank #812 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i7-840QM
Performance Per Dollar
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-840QM | Pentium Dual Core T3400 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($89) |
| Longevity | 🛑 Legacy (Clarksfield (2009−2010) / 45 nm) | 🛑 Legacy (NetBurst (2000−2006) / 65 nm) |
💎 Value Proposition
| Insight | Core i7-840QM | Pentium Dual Core T3400 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($89) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Core i7-840QM and Pentium Dual Core T3400
Core i7-840QM
The Core i7-840QM is manufactured by Intel. It was released in 20 June 2010 (15 years ago). It is based on the Clarksfield (2009−2010) architecture. It features 4 cores and 8 threads. Base frequency is 1.86 GHz, with boost up to 3.2 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 45 nm process technology. Socket: PGA988. Thermal design power (TDP): 45 Watt. Memory support: DDR3. Passmark benchmark score: 2,025 points. Launch price was $568.
Pentium Dual Core T3400
The Pentium Dual Core T3400 is manufactured by Intel. It was released in 2007-01-01. It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 2 threads. Max frequency: 2.16 GHz. L2 cache: 1 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 1 MB. Passmark benchmark score: 2,026 points. Launch price was $69.
Processing Power
The Core i7-840QM packs 4 cores / 8 threads, while the Pentium Dual Core T3400 offers 2 cores / 2 threads — the Core i7-840QM has 2 more cores. Boost clocks reach 3.2 GHz on the Core i7-840QM versus 2.16 GHz on the Pentium Dual Core T3400 — a 38.8% clock advantage for the Core i7-840QM. The Core i7-840QM uses the Clarksfield (2009−2010) architecture (45 nm), while the Pentium Dual Core T3400 uses NetBurst (2000−2006) (65 nm). In PassMark, the Core i7-840QM scores 2,025 against the Pentium Dual Core T3400's 2,026 — a 0% lead for the Pentium Dual Core T3400.
| Feature | Core i7-840QM | Pentium Dual Core T3400 |
|---|---|---|
| Cores / Threads | 4 / 8+100% | 2 / 2 |
| Boost Clock | 3.2 GHz+48% | 2.16 GHz |
| Base Clock | 1.86 GHz | — |
| L3 Cache | 8 MB (total) | — |
| L2 Cache | 256 kB (per core) | 1 MB+300% |
| Process | 45 nm-31% | 65 nm |
| Architecture | Clarksfield (2009−2010) | NetBurst (2000−2006) |
| PassMark | 2,025 | 2,026 |
| Geekbench 6 Single | 390 | — |
| Geekbench 6 Multi | 1,050 | — |
Memory & Platform
The Core i7-840QM uses the PGA988 socket (PCIe 2.0), while the Pentium Dual Core T3400 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.
| Feature | Core i7-840QM | Pentium Dual Core T3400 |
|---|---|---|
| Socket | PGA988 | PGA478 |
| PCIe Generation | PCIe 2.0+82% | PCIe 1.1 |
| Max RAM Speed | DDR3-1333 | — |
| Max RAM Capacity | 8 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 16 | — |
Advanced Features
Virtualization: VT-x, VT-d (Core i7-840QM) / not specified (Pentium Dual Core T3400). Primary use case: Core i7-840QM targets Laptop.
| Feature | Core i7-840QM | Pentium Dual Core T3400 |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x, VT-d | — |
| Target Use | Laptop | — |
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